earn your spurs
earn (one's) spurs
To prove one's skill in a particular area. Once you've watched the triplets for an entire day, then you'll have earned your spurs as a caretaker, as far as I'm concerned. After getting my bachelor's degree, I earned my spurs as a teacher by working in underfunded urban schools.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
earn your spursor
win your spursmainly BRITISH
COMMON If you earn your spurs or win your spurs, you show you are capable of doing something well, and can be relied on to do it well in the future. How did he earn his spurs for the toughest police job in the country? Kampelman had won his spurs as U.S. negotiator at the Madrid talks. Note: In medieval times, when a man was made a knight, he was sometimes given a pair of golden spurs.
Collins COBUILD Idioms Dictionary, 3rd ed. © HarperCollins Publishers 2012
win/earn your ˈspurs(formal) become successful or famous: You’ll win your spurs as a teacher if you can control class 5.
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